Jig.



G. H. ELMORE.

JIG.

APPLICATION FILED AUG-l4. m2.

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JIG-

APPLICATION FILED Aue.|4. 1.912.

1,149,641. Patented Aug. 10, 1915.

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GUYTI. ELMORE, OF-SWARTHMORE, PENNSYLVANIA, ASSIGNOR TOWILLIAM 0.

ELMORE, OF ONEONTA, NEW YORK.

JIG.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Application filed August 14, 1912. Serial No. 715,080.

To all whom it may concern Be it lmown that I, Gov H. ELMORE, a citizen of the 'United States, residing at Swarthmore, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Jigs, of which the following is a specification.

This invention relates to jigs such as are used for the classification or separation of minerals according to their specific gravities.

vThe principal featureof novelty resides in the discharge mechanism for removing the heavy materials forming the lower layers or bed, from the jig, and in the relation of the discharge mechanism to the ig bed and screen. 7

Although the invention is not confined in its utility to that field, I shall describe it as applied to a jig intended for washing coal to separate it from the bone and slate.

Referring to the accompanying drawings: Figure 1 is a vertical section of such a jig; Fig. 2 is an elevation of the discharge end of the same; Fig. 3 is an enlarged view of the dischargemechanism illustrated in Fig. 1; Fig. 4 is a section on the line IVIV of Fig. 3; and Fig. 5 is a perspective View of the guard plates and barrier forming a part of the discharge mechanism.

The main jig structure does not greatly differ from that fully described in my prior Patent No. 997,609, dated July 11, 1911.

A hopper-shaped chamber l is divided at its upper portion by a partition 2 into two chambers 3 and 4 which communicate beneath the partition 2. Mounted for vertical reciprocatory movement in chamber 3 isthe plunger 5 having the flexible sealing strips 6, and during the operation of the jig this is drivenby an eccentric 7 through a rod 8 and vertically guided yoke 9. The shaft 10, on which the eccentric 7' is mounted, may be driven in any suitable manner, for instance, by a beltwheel ll'as shown.

The above described mechanism will be recognized as familiar in the art.

In the chamber 4 is mounted the jig screen 12 supported at intervals on bars 13. Contrary to. the usual practice the screen is not set flush with the lower discharge opening, but is set a few inches below, there being an upstanding lip or barrier 14 over which the discharge of the heavier materials takes place. When this arrangement is used, a bed 15 of heavy granular material, such as feldspar or flint is placed on the screen, of a depth just reaching to the top of dam or barrier 14, and this arrangement gives peculiarly satisfactory results with certain classes of material. heavy material remains and is ,not discharged from the jig so that in a sense it is a part of the screen structure of the jig. With other classes of material this heavy bed is not desirable, and in such case the screen 12 is set approximately fiush with the upper edge of barrier 14, as is common in the art. The barrier 14 forms part of a cast- Obviously this bed of Y ing which includes a sloping discharge plate k 16 leading to a launder or trough (not shown), a concave cylindrical sealing surface 17 for the discharge valve and a bridge bar 18, on which last is adjustably held a companion sealing plate 19 for the discharge valve, by means of bolts 20.

The discharge valve 21 consists of a rotating vaned member, which, unlike the valve shown in my above mentioned prior patent, fits substantially water-tight against the sealing plates 17 and 19 as well as at its ends 22. The valve is rotated by a shaft 23 passing through a stuffing box 24 and carrying a ratchet 25. This may be driven at any desirable rate by a mechanism well known in the art and consisting of a rocker 26 carrying pawls 27 of slightly different lengths, so that one or another will always engage. This rocker is rocked by a crank 28 and pitman connection 29 as will be well v understood. Avariable feed of the ratchet is secured by making the point of connection 30 of pitman 29 with rocker 26 adjustable radially with respect to the rocker. Any means for rotating crank 28 may be adopted. The lighter materials which rise to the top of the jig bed are discharged over an inclined plate 31 which is adjustably mounted on plate 19 by means of bolts 32. 'The inner edge of ifs plate 31 has a depend-inglip'33, and adjustably mounted on this by bolts 34 is a complementary depending barrier plate which serves to define the upper limit of discharge of the heavier material.

By the adoption of the features above set forth I secure a highly successful operation of the jig. hen, for instance rather finely crushed coal is washed the addition of the flint bed materially improves the operation and the barrier 14 prevents any discharge of the flint from the jig. Theprincipal advantage, however, arises from the use of the water-tight valve. Just enough water passes with the discharge material to carry the latter down an ordinary launder. This allows me to do away with the water-tight boot and conveyer heretofore considered necessary and shown in my prior patent, and results in a material simplification of the device.

As will be apparent to those skilled in the art, the bone and slate will be discharged through the valve 21, while the washed coal will be discharged over the plate 31. When jigging metallic ores the concentrates are discharged through the valve 21, and the tailings over the plate 31.

Having thus described my invention, what I claim is 1. In a jig the combination of suitable supporting means; a screen; apparatus adapted to produce successive upward pulsations of water through said screen; a barrier practically icoextensive with one edge of said screen and extending upward therefrom; an overflow for the lighter materials mounted above said barrier and spaced therefrom to permit the discharge of heavier materials over said barrier and beneath said overflow; a positively actuated discharge mechanism mounted beyond said barrier and adapted to discharge from the jig the material flowing over said barrier beneath said overflow; and means adapted to prevent the outflow of water from the jig through said discharge mechanism.

2. In a jig the combination of suitable supporting means; a screen; apparatus for producing successive upward pulsations through said screen; a barrier extending upward across the discharge end of said screen; a bed of granular material heavier than that to be classified'held on said screen substantially level with the top of said barrier; an overflow for the lighter materials located above said barrier; a discharge valve for the heavier materials located below said overflow and beyond said barrier and comprising opposed sealing plates and a vaned rotary valve fitted substantially water tight between said plates; and means for rotating said valve.

3. In a jig, the combination of a suitable support; a screen; mechanism for producing successive upward pulsations of water through said screen; a discharge valve casing comprising adischarge chute and two complementary sealing plates adjustable to ward and from each other; a rotary valve member provided with isolated pockets, turning between said sealing plates, and making substantially water -tight contact therewith; means for rotating the valve member; an overflow plate mounted above said discharge valve; and means for adjusting said overflow plate.

41. In a jig, the combination of a suitable ing comprising a discharge chute and two complementary sealing plates ad ustable to -ward and from each other; a rotary valve member provided with isolated pockets, turningbetween said sealing plates, and making substantially water -tight contact therewith; means for rotating the valve member; and an overflow plate mounted above said discharge valve.

5. The combination with a jig, including a screen, of a discharge mechanism extending across the discharge end of said screen and comprising a discharge sluice for the heavier materials; a fixed sealing plate carried by said sluice; an opposed sealing plate adjustable toward and from said fixed sealing-plate; a vaned discharge valve rotatable between said plates and sealing therewith to prevent the free out flow of water through said sluice; and an overflow sluice for the lighter materials carried by said opposed sealing plate, vertically adjustable thereon, and located at a higher level than said vaned discharge valve.

Y 6. The combination with a jig, including a screen, of a discharge mechanism extending across the discharge end of said screen and comprising a discharge sluice for the heavier materials, leading from a point above the level of the screen; a fixed sealing plate carried by said sluice; an opposed sealing plate adjustable toward and from said fixed sealing plate; a vaned discharge valve rotatable between said plates and sealing therewith to prevent the free out flow of water through said sluice; and an overflow sluice for the lighter materials carried by said opposed sealing plate, vertically adjustable thereon, and located at a higher level than said vaned discharge valve.

7. The combination with a jig, including a screen, of a discharge mechanism extending. across the discharge end ofsaid screen and comprising a discharge sluice for the heavier materials; a fixed sealing plate carried by said sluice; an opposed sealing plate adjustable toward and from said fixed sealing plate; a vaned discharge valve rotatable between said plates and sealing therewith to prevent the free out flow of water through said sluice; and an overflow sluice for the lighter materials located above said vaned discharge valve.

8. In a jig the combination of suitable supporting means; a screen; apparatus adapted to produce successive upward pulsations of water through said screen; a barrier practically coextensive with one edge of said screen and extending upward therefrom; an overflow above said barrier and spaced therefrom to permit the discharge of solid material over said barrier and beneath said overflow; and a positively actuated pocketed name to this specification in the presence of discharge valve sealed against the outflow of two subscribing witnesses. water, mounted beyond said barrier and GUY H. ELMORE. adapted to discharge from the jig solid material flowing over said barrier.

In testimony whereof I have signed my Witnesses:

HARRY V. CRoLL, JULIA M. OBRIEN.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. O. 

